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GB 28381-2012 (GB28381-2012)

GB 28381-2012_English: PDF (GB28381-2012)
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GB 28381-2012English90 Add to Cart 0--9 seconds. Auto-delivery Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower Valid GB 28381-2012

BASIC DATA
Standard ID GB 28381-2012 (GB28381-2012)
Description (Translated English) Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower
Sector / Industry National Standard
Classification of Chinese Standard F01
Classification of International Standard 27.010
Word Count Estimation 10,115
Quoted Standard JB/T 2977; JB/T 3165; JB/T 7258
Drafting Organization Shenyang Blower (Group)Co., Ltd.
Administrative Organization National Energy Foundation and Management Standardization Technical Committee
Regulation (derived from) National Standards Bulletin No. 9 of 2012
Proposing organization National Development and Reform Commission, Department of Resource Conservation and Environmental Protection
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the centrifugal blower energy efficiency limit values ??and test methods for evaluating values ??of energy conservation. This standard applies to single-stage double support low-speed centrifugal blowers, multistage centrif

Standards related to: GB 28381-2012

GB 28381-2012
ICS 27.010
F 01
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
GB 28381–2012
Minimum allowable values of energy efficiency and
evaluating values of energy conservation for
centrifugal blower
ISSUED ON. MAY 11, 2012
IMPLEMENTED ON. SEPTEMBER 01, 2012
Issued by.
General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Classification of products ... 5
5 Technical requirements ... 5
6 Test method ... 13
References and Original Chinese Documents ... 14
Foreword
For the purpose of this standard, subclause 5.3 is normative and the other
clauses/subclauses are informative.
This standard is drafted in accordance with the rules of GB/T 1.1 – 2009.
This standard was proposed by the Department of Resource Conservation and
Environment Protection of the National Development and Reform Commission.
This standard is under the jurisdiction of National Technical Committee of Energy
Fundamentals and Management of Standardization Administration of China (SAC/TC
20).
Drafting organizations of this standard include Shenyang Blowers (Group) Co., Ltd,
China National Institute of Standardization, Shaanxi Blowers (Group) Co., Ltd,
Chongqing General Industry (Group) Co., Ltd, Nantong Dart-Pollrich Fan Co., Ltd,
Shandong Zhangqiu Blower Co., Ltd, Zhejiang Shangfeng Industrial Holding Ltd, and
Jiangsu Jintongling Fan Co., Ltd.
The chief drafting staffs of this standard include Chen Fengyi, Mei Yuanping, Zhao
Yuejin, Zheng Hua, Li Baohou, Liao Yulong, Li Junhua, Xu Baohua, Zhu Mengbo and
Cao Ping.
Minimum allowable values of energy efficiency and evaluating
values of energy conservation for centrifugal blower
1 Scope
This standard specifies the minimum allowable values of energy efficiency,
evaluating values of energy conservation, and test methods for centrifugal blowers.
This standard applies to single-stage dual-support low-speed centrifugal blowers;
multi-stage low-speed centrifugal blowers; single-stage dual-support high-speed
centrifugal blowers (including single-side impeller of dual-inlet blower); and
multi-stage high-speed centrifugal blowers.
2 Normative references
The following normative documents are indispensable for application of this standard.
For dated normative documents, only the edition dated with the day applies to this
standard. For undated normative documents, the latest edition (including all
amendments) applies to this standard.
JB/T 2977 Technical terms for industry fans, turbo-blowers and compressors
JB/T 3165 Thermodynamic performance test for centrifugal & axial blower and
compressor
JB/T 7258 Centrifugal blower for general purpose
3 Terms and definitions
The following definitions apply to this standard, in addition to those defined in JB/T
3165 and in JB/T 2977.
3.1
Minimum allowable values of energy efficiency for centrifugal blower
The minimum guaranteed allowable values of variable efficiency for centrifugal
blower, under the specified standard conditions of testing.
3.2
Evaluating values of energy conservation for centrifugal blower
the minimum guaranteed allowable values of variable efficiency which shall be
achieved with respect to energy conservation for centrifugal blower, under the
specified standard conditions of testing.
4 Classification of products
By the number of stages, structure and number of revolutions, a centrifugal blower
may be classifed as single-stage cantilever-fitted low-speed centrifugal blower;
single-stage dual-support low-speed centrifugal blower; multi-stage low-speed
centrifugal blower; single-stage cantilever-fitted high-speed centrifugal blower;
single-stage dual-support high-speed centrifugal blower; and multi-stage high-speed
centrifugal blower etc.
5 Technical requirements
5.1 Basic requirements
Product design, manufacturing and quality of centrifugal blower shall comply with
provisions of JB/T 7258.
5.2 The variable efficiency of centrifugal blower shall be calculated according
to the following equation.
%100
)/lg(
)/lg(
)1/(
1%100
)1/(
)1/(%100
pol ××=

=×=
TT
PP
kkkk
mm
tot
polη ... (1)
Where.
ηpol is the polytropic efficiency of the centrifugal blower;
Table 6 Evaluating values of energy conservation for multi – stage low –
speed centrifugal blowers
b 2 /D 2
Number
of stages
The highest polytropic efficiency of the centrifugal blower within the
operating range, ηpol, %
Impeller diameter, D 2 , in mm
Less than
301 to 400 401 to 600 601 to 800
More than
Less than 0.020
2 to 3 54.5 56.0 57.0 58.5 57.5
4 to 6 54.0 55.5 56.5 58.0 57.0
0.021 to 0.030
2-3 68.5 71.5 72.0 73.5 74.0
4 to 6 68.0 71.0 71.5 73.0 73.5
0.031 to 0.040
2 to 3 70.5 73.0 73.5 74.5 75.5
4 to 6 70.0 72.5 73.0 74.0 75.0
0.041 to 0.050
2 to 3 73.0 74.0 74.5 75.5 76.5
4 to 6 72.5 73.5 74.0 75.0 76.0
References and Original Chinese Documents
[1] GB 28381-2012 The centrifugal blower energy efficiency limited value and evaluating
values of energy.
...